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Due to the growing needs for energy saving and quiet motor operation, brushless DC (BLDC) motors are widely used for various applications.
To improve the motor drive efficiency, a complicated process is generally required. Toshiba offers motor drive controllers that solve this problem.

When a BLDC motor is driven with a sine wave, changes in the RPM of a motor due to the effect of its impedance cause a phase difference between its voltage and current, decreasing the drive efficiency. Therefore, phase adjustment is necessary to improve efficiency. Toshiba’s InPAC technology compares the relationship between the current phase (current information) and the voltage phase (Hall-effect signal) and provides feedback to the motor current control signal in order to adjust their phase relationship automatically. As a result, InPAC provides high efficiency.

In order to achieve the highest efficiency using conventional technology, it is necessary to adjust a phase difference between the voltage and current of a motor at several points in its operating RPM range. In contrast, Toshiba's InPAC technology allows you to automatically adjust the phases of a motor’s voltage and current and thereby achieve the highest efficiency across the entire operating RPM range only through initialization. Therefore, InPAC helps reduce your development workload.

Reduces the number of external components necessary for lead angle control and eliminates the need for any programming according to the changing operating states of a motor

With an eye to emerging needs, Toshiba has developed InPAC in response to accelerating social and technological trends. InPAC can be used without any need for complicated adjustment. Toshiba offers an extensive portfolio of BLDC motor drive controllers with InPAC suitable for various needs. If you want to evaluate your product plan or design using a BLDC motor incorporating InPAC, reference designs are available for download.

• Evaluation Board for 3 phase brushless DC motor driver